By denying access to the voting machine they hope to have security through obscurity under the guise of trade secrecy most likely. In the world of cryptography security through obscurity is bogus. Read this entry for more information Security through Obscurity. If the system is secure it should be completely open to public scrutiny. If they do not allow the machines to be tested in a public fashion they have something to hide. Developers who claim their software is secure will invite scrutiny thus proving such.
Slashdot Mirror
By denying access to the voting machine they hope to have security through obscurity under the guise of trade secrecy most likely. In the world of cryptography security through obscurity is bogus. Read this entry for more information Security through Obscurity. If the system is secure it should be completely open to public scrutiny. If they do not allow the machines to be tested in a public fashion they have something to hide. Developers who claim their software is secure will invite scrutiny thus proving such.